(The Dalles, OR)  --  Crews remain on the scene of a brush fire west of The Dalles that forced evacuations and closed I-84 Wednesday afternoon.  Fire officials say the blaze is 70-percent contained as of last night.  The fire downed power lines across the freeway and prompted Level 3 evacuations for nearby apartments, a mobile home park and the Columbia Gorge Discovery Center & Museum.  The evacuation orders were downgraded to Level 1 later last night, allowing residents to return home.  The freeway was reopened after the power lines were removed.  The cause of the fire remains under investigation.